1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/* Copyright (C) 2002-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <support/check.h>
#include <support/test-driver.h>
#include <support/timespec.h>
#include <support/xthread.h>
#include <support/xtime.h>
/* A bogus clock value that tells run_test to use pthread_rwlock_timedrdlock
and pthread_rwlock_timedwrlock rather than pthread_rwlock_clockrdlock and
pthread_rwlock_clockwrlock. */
#define CLOCK_USE_TIMEDLOCK (-1)
static int kind[] =
{
PTHREAD_RWLOCK_PREFER_READER_NP,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
PTHREAD_RWLOCK_PREFER_WRITER_NP,
};
struct thread_args
{
pthread_rwlock_t *rwlock;
clockid_t clockid;
const char *fnname;
};
static void *
tf (void *arg)
{
struct thread_args *args = arg;
pthread_rwlock_t *r = args->rwlock;
const clockid_t clockid = args->clockid;
const clockid_t clockid_for_get =
(clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
const char *fnname = args->fnname;
/* Timeout: 0.3 secs. */
struct timespec ts_start;
xclock_gettime (clockid_for_get, &ts_start);
struct timespec ts_timeout = timespec_add (ts_start,
make_timespec (0, 300000000));
verbose_printf ("child calling %srdlock\n", fnname);
if (clockid == CLOCK_USE_TIMEDLOCK)
TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), ETIMEDOUT);
else
TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout),
ETIMEDOUT);
verbose_printf ("1st child %srdlock done\n", fnname);
TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts_timeout);
xclock_gettime (clockid_for_get, &ts_timeout);
ts_timeout.tv_sec += 10;
/* Note that the following operation makes ts invalid. */
ts_timeout.tv_nsec += 1000000000;
if (clockid == CLOCK_USE_TIMEDLOCK)
TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), EINVAL);
else
TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout), EINVAL);
verbose_printf ("2nd child %srdlock done\n", fnname);
return NULL;
}
static int
do_test_clock (clockid_t clockid, const char *fnname)
{
const clockid_t clockid_for_get =
(clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
size_t cnt;
for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
{
pthread_rwlock_t r;
pthread_rwlockattr_t a;
if (pthread_rwlockattr_init (&a) != 0)
FAIL_EXIT1 ("round %zu: rwlockattr_t failed\n", cnt);
if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
FAIL_EXIT1 ("round %zu: rwlockattr_setkind failed\n", cnt);
if (pthread_rwlock_init (&r, &a) != 0)
FAIL_EXIT1 ("round %zu: rwlock_init failed\n", cnt);
if (pthread_rwlockattr_destroy (&a) != 0)
FAIL_EXIT1 ("round %zu: rwlockattr_destroy failed\n", cnt);
struct timespec ts;
xclock_gettime (clockid_for_get, &ts);
++ts.tv_sec;
/* Get a write lock. */
int e = (clockid == CLOCK_USE_TIMEDLOCK)
? pthread_rwlock_timedwrlock (&r, &ts)
: pthread_rwlock_clockwrlock (&r, clockid, &ts);
if (e != 0)
FAIL_EXIT1 ("round %zu: %swrlock failed (%d)\n",
cnt, fnname, e);
verbose_printf ("1st %swrlock done\n", fnname);
xclock_gettime (clockid_for_get, &ts);
++ts.tv_sec;
if (clockid == CLOCK_USE_TIMEDLOCK)
TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EDEADLK);
else
TEST_COMPARE (pthread_rwlock_clockrdlock (&r, clockid, &ts), EDEADLK);
verbose_printf ("1st %srdlock done\n", fnname);
xclock_gettime (clockid_for_get, &ts);
++ts.tv_sec;
if (clockid == CLOCK_USE_TIMEDLOCK)
TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EDEADLK);
else
TEST_COMPARE (pthread_rwlock_clockwrlock (&r, clockid, &ts), EDEADLK);
verbose_printf ("2nd %swrlock done\n", fnname);
struct thread_args args;
args.rwlock = &r;
args.clockid = clockid;
args.fnname = fnname;
pthread_t th = xpthread_create (NULL, tf, &args);
puts ("started thread");
(void) xpthread_join (th);
puts ("joined thread");
if (pthread_rwlock_destroy (&r) != 0)
FAIL_EXIT1 ("round %zu: rwlock_destroy failed\n", cnt);
}
return 0;
}
static int do_test (void)
{
do_test_clock (CLOCK_USE_TIMEDLOCK, "timed");
do_test_clock (CLOCK_REALTIME, "clock(realtime)");
do_test_clock (CLOCK_MONOTONIC, "clock(monotonic)");
return 0;
}
#include <support/test-driver.c>
|
